异步振荡的特点为失步的发电厂间联络线的输送功率（）。
参考答案：往复摆动
---How can you make such tea?
---Just let the leaves in the water of 75 for some time.
A．to remain
B．remain
C．to leave
D．fall
灭火器及其附件安装设置要求有哪些？
for some time.